2.5.52 compile error

[rtilley]

Using RH's default *i686.config to build a vanilla 2.5.52 kernel. It keeps 
returning this error on 2 totally different x86 PCs:

drivers/built-in.o: In function `kd_nosound':
drivers/built-in.o(.text+0x1883f): undefined reference to `input_event'
drivers/built-in.o(.text+0x18861): undefined reference to `input_event'
drivers/built-in.o: In function `kd_mksound':
drivers/built-in.o(.text+0x1890a): undefined reference to `input_event'
drivers/built-in.o: In function `kbd_bh':
drivers/built-in.o(.text+0x197a2): undefined reference to `input_event'
drivers/built-in.o(.text+0x197c1): undefined reference to `input_event'
drivers/built-in.o(.text+0x197e0): more undefined references to `input_event' 
follow
drivers/built-in.o: In function `kbd_connect':
drivers/built-in.o(.text+0x19d54): undefined reference to `input_open_device'
drivers/built-in.o: In function `kbd_disconnect':
drivers/built-in.o(.text+0x19d7f): undefined reference to `input_close_device'
drivers/built-in.o: In function `kbd_init':
drivers/built-in.o(.init.text+0x12c1): undefined reference to 
`input_register_handler'
make: *** [.tmp_vmlinux1] Error 1

Where is the fix for this?